Printing – Stenciling – Stencils
Patent
1998-02-13
2000-06-13
Hilten, John S.
Printing
Stenciling
Stencils
1011271, B10S 1706, B10S 1708
Patent
active
060735546
ABSTRACT:
A printing screen assembly is provided with an integral shield to protect the ink which is dispensed on the top surface of the screen during the printing process. The mesh material is mounted on a frame member and coated with exposed emulsion with open areas for transferring ink to a glass substrate. A shield is mounted on a second frame member and positioned on the first frame member so that the shield is placed in parallel spaced-apart relationship with the mesh material. The frame members, the mesh material and the shield form an enclosed ink containment area to protect the ink from contamination during the printing process. For water-based ink, water vapor can be added to the containment area to maintain the ink at the desired relative humidity. An ink dispensing strip fits in the containment area between the shield and the mesh fabric of the screen. The shield must have sufficient elasticity such that the forces of the flood bar and squeegee of the printing press are transmitted to the ink and the mesh material of the screen. The process of manufacturing the printing screen assembly includes the step of forming the printing screen and the shield on two separate frame members.
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Colilla Daniel J.
Hilten John S.
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